I am looking for a 3D paper model of river going boat. 20-30 feet long, 10 feet wide and 2-3 feet deep.; no sail just oars. I've been actively searching and my google-fu is weak. 25-30mm scale would be ideal. I have come across Dave Grafham's Patrol Boat and while it is a nice little model not suitable for what I am looking for. I did come across this one http://www.papercraftsquare.com/a-longboat-free-papercraft-download.html but the creator's site seems to be defunct. Any assistance would be much appreciated!